Jeep Grand Cherokee WJ. Manual - part 1139

TEST

ACTION

APPLICABILITY

WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND
WAIT TWO MINUTES BEFORE PROCEEDING.
WARNING: DO NOT PLACE AN INTACT UNDEPLOYED AIRBAG FACE
DOWN ON A HARD SURFACE, THE AIRBAG WILL PROPEL INTO THE AIR
IF ACCIDENTALLY DEPLOYED, AND COULD RESULT IN SERIOUS OR
FATAL INJURY.
Disconnect the Passenger Airbag.
Disconnect the Airbag Control Module connector
NOTE: Check connectors - Clean / repair as necessary.
Connect the Airbag System Load Tool # 8310 ACM adaptor to the Airbag Control
Module connector.
Measure the resistance of the Passenger Airbag Line 1 circuit between the Airbag
Module connector and ground.
Is the resistance below 10.0 Kohms on Passenger Airbag Line 1 circuit ?

All

Yes

→

Repair Passenger Airbag Line 1 for a short to ground.
Perform AIRBAG VERIFICATION TEST - VER 1.

→

Go To

NOTE: When reconnecting airbag system components the Ignition must be
turned off and the Battery must be disconnected.

WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND
WAIT TWO MINUTES BEFORE PROCEEDING.
WARNING: DO NOT PLACE AN INTACT UNDEPLOYED AIRBAG FACE
DOWN ON A HARD SURFACE, THE AIRBAG WILL PROPEL INTO THE AIR
IF ACCIDENTALLY DEPLOYED, AND COULD RESULT IN SERIOUS OR
FATAL INJURY.
Disconnect the Passenger Airbag.
Disconnect the Airbag Control Module connector
NOTE: Check connectors - Clean / repair as necessary.
Connect the Airbag System Load Tool # 8310 ACM adaptor to the Airbag Control
Module connector.
Measure the resistance of the Passenger Airbag Line 2 circuit between the Passenger
Airbag connector and ground.
Is the resistance below 10.0 Kohms on Passenger Airbag Line 2 circuit ?

All

Yes

→

Repair Passenger Airbag Line 2 for a short to ground.
Perform AIRBAG VERIFICATION TEST - VER 1.

→

Go To

NOTE: When reconnecting airbag system components the Ignition must be
turned off and the Battery must be disconnected.

WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND
WAIT TWO MINUTES BEFORE PROCEEDING.
WARNING: IF THE AIRBAG CONTROL MODULE IS DROPPED AT ANY
TIME, IT MUST BE REPLACED.
If there are no possible causes remaining, view repair.

All

Repair

Replace the Airbag Control Module in accordance with Service
Instructions. WARNING: make sure the battery is disconnected
and wait 2 minutes before proceeding.
Perform AIRBAG VERIFICATION TEST - VER 1.

NOTE: When reconnecting airbag system components the Ignition must be
turned off and the Battery must be disconnected.

AIRBAG

PASSENGER SQUIB SHORT TO GROUND - ACTIVE —

Continued

Symptom:

WARNING LAMP CIRCUIT OPEN - ACTIVE

When Monitored and Set Condition:

WARNING LAMP CIRCUIT OPEN - ACTIVE

When Monitored:

When the ignition is On, the ACM monitors the PCI Bus for a message

from the MIC containing the airbag warning lamp status Ok or Open. The MIC transmit
the message one time per second in response to the ACM lamp On/Off message.

Set Condition:

The code is set if the lamp state is open for 2 consecutive messages or 2

seconds.

POSSIBLE CAUSES

MIC, COMMUNICATION FAILURE

AIRBAG WARNING INDICATOR CKT OPEN

ACM, AIRBAG WARNING INDICATOR CIRCUIT OPEN

TEST

ACTION

APPLICABILITY

Turn the ignition on.
With the DRBIII

t, attempt to communicate with the Instrument Cluster.

Did the DRB establish communication with the Instrument Cluster?

All

Yes

→

Go To

→

Refer to category COMMUNICATION and select the related
symptom INSTRUMENT CLUSTER BUS +/- SIGNAL OPEN.
Perform AIRBAG VERIFICATION TEST - VER 1.

With the DRB select PASSIVE RESTRAINTS, AIRBAG and MONITOR DISPLAY.
With the DRBIII

t, read the WARNING LAMP MONITOR screen.

Select the LAMP STATUS displayed on the DRB monitors screen.

All

9LAMP STATUS: OK9

Go To

2. LAMP STATUS: OPEN

Replace Instrument Cluster circuit board.
Perform AIRBAG VERIFICATION TEST - VER 1.

All

Repair

NOTE: When reconnecting airbag system components the Ignition must be
turned off and the Battery must be disconnected.

AIRBAG

Symptom:

*AIRBAG INDICATOR ON WITHOUT ACTIVE TROUBLE CODES

POSSIBLE CAUSES

INSTRUMENT CLUSTER PROBLEMS

AIRBAG WARNING INDICATOR ON WITHOUT TROUBLE CODES

TEST

ACTION

APPLICABILITY

Turn the ignition on.
Make sure that all Airbag and Instrument Cluster DTCs have been repaired before
pre forming this procedure.
With the DRBIII

t select MONITOR DISPLAY, WARNING LAMP STATUS and read

the PASSIVE RESTRAINTS, AIRBAG, MONITOR DISPLAY, WARNING LAMP
STATES.
With no active DTCs, Does the MIC Bulb STATE and MIC DRIVER STATE both
display ON?

All

Yes

→

Refer to symptom list for problems related to Instrument Cluster.
Perform AIRBAG VERIFICATION TEST - VER 1.

NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.

AIRBAG

Symptom:

ALL OUTPUTS SHORTED

When Monitored and Set Condition:

ALL OUTPUTS SHORTED

When Monitored:

Ignition in RUN and IOD fuse installed.

Set Condition:

The radio has sensed a short on the output for more than 10 seconds.

POSSIBLE CAUSES

DETERMINE FAULT

SPEAKER SECTION OF POWER AMPLIFIER

(+) CIRCUIT SHORTED TO GROUND

(-) CIRCUIT SHORTED TO GROUND

SPEAKER (+) & (-) CIRCUITS SHORTED TOGETHER

SPEAKER SECTION OF RADIO

TEST

ACTION

APPLICABILITY

Turn the ignition on.
Turn the Radio on.
With the DRBIII

t, erase the audio DTC’s.

Cycle the ignition switch from off to on and wait 10 seconds.
With the DRBIII

t, read the audio DTC’s.

Does the DRBIII

t display ALL OUTPUTS SHORTED?

All

Yes

→

Go To

→

Refer to the wiring diagrams located in the service information to
help isolate a possible short.
Perform BODY VERIFICATION TEST - VER 1.

Turn the ignition off.
Disconnect the Power Amplifier C1 harness connector.
Turn the ignition on.
Turn the radio on.
With the DRBIII

t, erase the audio DTCs.

Cycle the ignition switch from off to on and wait 10 seconds.
With the DRBIII

t, read DTC’s.

Does the DRBIII

t display ALL OUTPUTS SHORTED?

All

Yes

→

Go To

→

Replace the Power Amplifier.
Perform BODY VERIFICATION TEST - VER 1.

AUDIO

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